Slag-furnace.



No. 727,057. PATENTED'MAY 5,1903.

R. BAGGALEY L o. s. GARRBTSON. SLAG FURNAGB.

APPLICATION FILED FEB. 17, 1902. EENEWBD 00113. 1902.

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PATENTED MAY 5, 1903. R. BAGGALEY & O. S. GARRETSON.

SLAG FURNAGE.

APPLIOATION FILED FEB. 17, 1992. RENEWED 001:13. 1902.

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UNrrED STAT-Es Patented May 5,

PATENT OFFICE.

RALPH BAGGALEY, OF PITTSBURG, PENNSYLVANIA, AND OLIVER S. GAR RETSON, OF BUFFALO, NEW YORK; SAID GARRETSON ASSIGNOR TO GARRETSON FURNACE COMPANY, OF PITTSBURG, PENNSYLVANIA, A CORPORATION OF WEST VIRGINIA. i

SLAG-FURNACE.

SPECIFICATION forming part o'f Letters Patent No. 727,057, dated May 5, 1903 Application led February 17,1902. Renewed October 13. 1902. Serial No. 127,186. (No model.)

haces, of which the following is a specification.

This invention relates to an apparatus for utilizing the heat contained in molten slag to heat a steam-boiler or other vessel or apparatus wherein the boiler or other vessel or apparatus is provided with one or more upright ire tubes, ilues, or chambers, to the upper portion of which the molten slag is suppliedfrom the smelting-furnace,and from the lower portion of which the chilled or congealed slag is removed.

The main object of the invention is to provide an apparatus of this nature in which the chilled or congealed slag is removed graduF ally or little by little from below, so that the body or column of slag is gradually lowered in the tube and space made at the top for the molten slag, whereby au approximately even temperature is maintained in the boiler.

In the accompanying drawings, consisting of two sheets, Figure l is a sectional elevation of an apparatus embodying the invention. Fig. 2 is a horizontal section through the boiler in line 2 2, Fig. l. Fig. 3 is a horizontal section on line 3 3, Fig. 1, showing the crushing mechanism for removing the slag. Fig. 4 is a plan View, on a reduced scale, showing the means for supplying the molten slag to the tire tubes or ilues. Fig. 5 is a vertical section of a slightly-dierent means for removing the slag from the fire .tubes or chambers.

Like letters of reference refer to like parts in the several figures.

A represents an upright steam-boiler or similar vessel or apparatus which is provided with upright lire or heating tubes, dues, or chambers a, extending from the upper to the lower head of the boiler and open at both ends. These tubes or chambers are preferably iiaring downwardly, so that their internal diameter increases from the top toward the bottom. The boiler is surrounded by and supported in a casing'B ofany suitable construction, so as to prevent the radiation of heat from the boiler. Space is provided in the casing beneath the boiler for a car or other receptacle C for receiving the crushed slag, which is removed from the fire-tubes. As shown, the chamber beneath the boiler is provided with doors c at opposite sides, and a track c is provided on which the car can be run in and filled with the crushed slag and then run out and replaced by another car.

Below each tire tube or chamber there is arranged a slag crushing or grinding mechanism, which operates upon the lower portion of the body or column of congealed slag, so as to grad uallycrush orgrindthe same away. In Figs. 1, 3, and 4. this crushing or grinding machine consists of a stationary plate or jaw D and an opposite cooperating rotary crushing or grinding wheel or roller E. The jaws may be secured. to the bottom of the boiler, as shown, two adjacent jaws being formed on the same attaching-plate d, or the jaws may be otherwise supported, as may be preferred. Each jaw, as shown, isprovided with a concave face d', which inclines beneath the tube toward the crushing-wheel, the teeth or ribs of which project beneath the open end of the tu be from the opposite side thereof. The inclined jaw and the crushing-wheel sufficiently obstruct the lower end of the tube to prevent the slag from escaping from the tube except as it is crushed or ground between theY jaw and wheel by the rotation of the latter. As the crushing-wheel gradually breaks or wears away the lower end of the b ody or column of congealed slag the latter slowly descends by gravity. The inclined stationary jaw wedges the slag over against the wheel, so that the latter always takes a firm hold of the slag. The fire-tubes, as shown in Figs. l, 2, and 4.,

Vare arranged in straight rows, and all of the crushing-wheels E for one row are fixed on a horizontal shaft e, j ournaled in suitable bearings e. The several shafts are driven by any suitable means, for which purpose the shafts may be provided at one end with sprocket- Wheelsf, which are driven from drive-shafts F above the boiler bysprocket-chains f', connecting the sprocket-wheels f on the shafts e, respectively, with sprocket-wheels f2 on the shafts F.

Any other suitable crushing or grinding means for breaking and removing the congealed slag from the lower end of the firetubes may be employed. For instance, in Fig. 5 the stationary crushing-jaw D is replaced by a crushing Wheel or roller G, which is arranged opposite the crushing-wheel E and driven in the opposite direction.

The molten slag is supplied to the fire-tubes by suitable means, such as the jointed slagspout H. (Shown in Figs. l and e.) This spout is composed of a [iXed section h, leading from the smelting-furnace, and inner and outer swinging sections h' h2, arranged, respectively, below the fixed section and the first swinging section. This construction enables the delivery end'of the spout to be swung so as to supply the molten slag to the upperend of any one of the tubes of the boiler or to the tubes of different boilers arranged adjacent to each other, as shown in Fig. 4, in which two boilers A (shown in dotted lines) are arranged on opposite sides of a well or chamber A', in which the driving or crush the lower ends of the slag columns,

the crushed slag falling into the car or receptacle. As each column of slag descends in the tube by the removal of its lower portion an annular space is formed between the column of slag and the tube, owing to the ilaring shape of the tube and the contraction and shrinkage of the cooling slag. The molten slag which is poured into the tube runs down into this annular space, as shown at the right in Fig. l. A comparatively thin layer of molten slag is ,thus kept in contact with the tube nearly throughout its entire length and the tube is kept heated with approximate uniformity by this gradual supply of molten slag,

whereby sudden and severe changes of temperature aud the strains and-injuries to the boiler resulting therefrom are avoided.

We claim as our invention- 1. The combination of a boiler or other vessel provided with a fire tube or chamber adapted to be supplied with molten slag, and a crushing mechanism for removing the congealed end of the body of slag in said tube or chamber, substantially as set forth.

2. The combination of a boiler or other vessel provided With an upright fire tube or chamber, means for supplying molten slag thereto, and a crushing mechanism located beneath the lower end of said tube or chamber and adapted to support `the column of congealed slag therein and crush the lower portion of said slag column to gradually remove the cougealed slag from said tube or chamber, substantially as set forth.

3. The combination of a boiler or other vessel provided With an upright lire tube or chamber having doWnwardly-diverging Walls and adapted to be supplied with molten slag, and a crushing mechanism arranged below said tube and adapted to crush the lower end of In testimony whereofwe have signed our names to this speciiication in the presence of two subscribing witnesses.

RALPH BAGGALEY. OLIVER S. GARRETSON.

. Witnesses to the signature of Ralph Baggaley:

MALCOLM L. MACDONALD,

AZELLE E. HoBAR'r.

Witnesses to the signature of Oliver S. Garretson:

JNO. J. BONNER,

CLAUDIA M. BENTLEY. 

